Operation panel for machine tools



FIG. 1 is a perspective view of an operation panel for machine tools showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines depict unclaimed environmental subject matter. 

CLAIM The ornamental design for an operation panel for machine tools, as shown and described. 